package com.ljx.rabbit.interceptor;

import com.ljx.rabbit.context.BaseContext;
import com.ljx.rabbit.properties.JwtProperty;
import com.ljx.rabbit.util.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
@Slf4j
@RequiredArgsConstructor
public class JwtInterceptor implements HandlerInterceptor {
    private final JwtProperty jwtProperty;



    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        //1、从请求头中获取令牌
        String token = request.getHeader(jwtProperty.getTokenHeader());
        log.info("{}",jwtProperty);
        //2、校验令牌
        try {
            log.info("jwt校验:{}", token);
            Claims claims = JwtUtil.parseJWT(jwtProperty.getSecret(), token.split(" ")[1]);
            Long userId = Long.valueOf(claims.get("userId").toString());
            log.info("当前用户id：", userId);
            BaseContext.setCurrentId(userId);
            //3、通过，放行
            return true;
        } catch (Exception ex) {
            //4、不通过，响应401状态码
            response.setStatus(401);
            log.info("错误信息:{}",ex.getMessage());
            return false;
        }
    }
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        BaseContext.removeCurrentId();

    }
}
